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I downloaded satellite images but mtl files were not in the zip. I searched a lot but i dint get from where to download mtl files. I need to convert radiance to temperature in both L7 and L8 images.

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    Can you specifiy from where you downloaded the data that it was provided without the Metadata files? – Kersten Jun 20 '15 at 12:34
  • from earthexplorer. The file format is in jpg but no mtl file.I dont know whether you need special privileges as a user to download it. – Vid Jun 26 '15 at 11:55
  • To convert radiances to temperatures you'll need the full Level 1 dataset - "Level 1 GeoTIFF Data Product". These are distributed as GeoTiffs and allways contain the metadata in a MTL file. There are no special requirements, apart from registering a free account. – Kersten Jun 26 '15 at 13:30
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The USGS provides a tool for bulk downloading of Landsat Metadata: Landsat Bulk Metadata Service

The MTL files will allways be distributed with the data if you download the scenes through USGS EarthExplorer.

If you don't want to download the bands again and just the MTL text files for each scene you can take a look at Amazons Landsat Mirror. Each scene is in a subfolder also containing a MTL text file with the metadata.

edit:

Landsat 8 metadata specifically is also released daily in CSV format by USGS and can be queried with tools like landsat-api.

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